Type-writing machine.



LVS. BURFHDGLDECD.

F o. BURHIDGE, EXECUTOR.

TYPE WRITING MACHINE.

APPLICATION FILED AUG.6,19I5

Patented Mar. 19, 191 8.

g wm z WIT/ 9 581 UNITED STATES PATENT OFFICE.

LEE s. BUBBIDGE, DECEASED, LATE or NEW your, N. Y., BY FRANCIS o. nurmrnon,

. EXECUTOR, or NEW YORK, is. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TOUNDER- .woon rrrnwmrnn COMPANY, or NEWYYORK, n. Y., A CORIORATION or DELAWARE.

TYPE-WRITING MACHINE.

Specification 01 Letters Patent.

Patented Mar. 19, 1918.

Application filed August 6, 1915. Serial No. 43,992.

To all whom it ma concern:

Be it known that LEE S. BURRIDGE, de ceased, late a citizen of the United States, and late residing. in the borough of Manhattan, county, city, and State of New York, in,- vented certain new and useful Improve ments in Type-VVriting Machines, of which the following is a specification.

This invention relates to the line-spacing mechanism of typewriting machines, and its object is to provide a simple and inexpensive mechanism which shall be of very light weight and extremely compact as well as durable, so as to be suitable for use in typewriters of the portable class.

The platen frame or carriage of the typewriter may be made of sheet metal, and may comprise an end plate, and the linespace mechanism may be compactly mounted upon the inner and outer sides of said end plate; the line-spacing parts being made preferably all of sheet metal and compactly assembled.- a

v The line-space lever may have a fingerpiece to, cooperate with a finger-piece formed upon the end plate of the platen frame, so that by pinching one finger-piece toward the other, the line-spacing of the platen will be efiected, and at the same time the operator will be given a grip upon the platen frame or carriage, for returning the same to begin a new line of writing? These finger-pieces are located at the upper portion of the device, for ready access; and thereforethelever may be pivoted at the bottom of the end plate, and may be connected by an upwardly-extending link to I a bell-crank mounted upon the platen axle,

i,and.havin a pawl to engage the line-space lwheel, T ese and the other devices connected with the line-space mechanism may be all arranged abovethe carriage tracks, even though the latter-are placed very close to the bottom ofthe platen; thus securing the desideratum of compactness, which. is

essential in this class of machines.-

The. line-space regulator is simple, compact and. efi'ective, and is preferably controlled by the samespring which returns the line-space lever to normal position. The throw-off lever for disconnecting the 5 ringdetent from the line-space' ratchet w eel is so formed as to be convenient of access and to clear the other parts of the mechanism, without sacrificing compactness.

Other features and advantages will hereinafter appear.

' In the accompanying drawings,

Figure 1 is a part-sectional side elevation of the platen frame or carriage, etc., embodying the present improvements in linespacing mechanism.

Fig. 2 is a part-sectional front elevation showing particularly the line-spacing bellcrank and connections.

Fig. 3 is a plan of the parts seen in Fig. 1.

Fig. 4 is a view similar to Fig. 2, but showing the line-space lever and connections with the bell-cran Fig. 5 is a plan showing the means for Upon one end of the platen axle, within the platen frame, is fixed a line-space wheel 10 which is engaged. by a roll detent 11 mounted between a pair' of arms 12 pivoted upon astud 13. projecting inwardly from an end plate 3 of the platen frame. A spring 14 is connected to a stud 15 which forms the arbor of the roll 11 and holds said roll in engagement with. the line-space wheel. I The line-spacing is eflect'ed by a, lever 16 pivoted at 17 upon the lower portion of the plate 3' and extending upwardly and having at its upper end a finger-piece 18 for pressing rearwardly; the end plate 3-of the piece 18 is pressed rearwardly by the thumb, so that by an action of. pinching 18 toward 19, the lever 16 is vibrated rearwardly, and the parts 18, 19 form a hand-hold for re platen frame being provided with an opposite cooperat ng finger-piece .19, which may be grasped'by thefinger while the finger-- turning the carriage.= This lever 16 has a extending-link 21 to a Wrist 22 provided arm 23 pivoted loosely upon theshort rearwardlypxtending platen-driving 23 being preferably ,saidplate; and the link 21 extending from the arm to, rock *rearwardly.)

23 through an opening 2 in in the plate.

The arm 23 forms part of a bell-crank, the other arm of whichis marked 25; said bellcrank being preferably formed of a single piece of sheet metal, which is folded at 26 near the fulcrum; the fold being open to give the bell-crank a suitable width of bear: ing on the axle 2, to reduce the liability of binding action. At its upper end the arm 25 carries a platen-driving pawl 27, normally disengaged from the ratchet wheel 10, but

automatically engaged therewith by means as the arm 25 begins Thus the rearward movement of the. line-spacing lever 16 pulls down the link 21 and rocks the bell-crank 23, 25, causing the pawl 27 to drop nto a tooth of the line-Space wheel and then turn the wheel and platen. The line-space lever 16 is provided with a returning draw spring .29, connected at 30 toastud upon the. arm 20, and extending upwardly to a. point of anchorage 31. i

The platen turns until a t0o' 32 projecting from the pawl 27 engages a stop where by the platen is arrested; the toe and stop cooperating with the tooth'l'ilof the pawl to prevent overthrow of the platen, since any tendency of the ratchet tooth to force out the .pawl toot-h only causes the too to press more firmly againstthe stop 33; and the driving pressure upon the finger-piece 18 of 'a spring 28, as soon having the effect of forcing the pawl tooth 34f more'firmly into the notch of the ratchet wheel, because of the cooperation of the toe 32 and the stop Tho pawl 27 and the toe 32 form a bell-crank, the too 32 extending toward the platen axle 2, and the pawl 27 extending around the ratchet wheel in advance of the pawl-carrying arm 25, where.-

' swing out of wheel, because of the arrest by these results are secured.

Upon the return of the parts to normal position, the spring 29 carries back the arm 25 and pawl 27 until the too 32 engages with the wall 35 of the'notch formed in the upper edge of the plate and further return movement of the arm 25 causestlie pawl to engagement with of the too 32.

The stop 33 .is mounted upon an arm or regulator 36, pivoted. at 37 in the plate 3 and having a fingenpiece 38,. whereby it may. be turned around its pivot to swing the stop 3:, out of range of the toe 32, permit ting said too to ngage the opposite wall 39. of the notch in. the plate 3, at the condlusion side ofthe plate 3, while the .the operator lifts a slot 41 to engage ,scope of the invention,

.pivoted upon the the ratchet of a movement of the platen through two line-spaces, 3 The spring 29 is connected to a pin 31 on said lever 36, and serves-as a doublc-aclting spring to hold said regulator either in its single-space position at Fig. 1 or in its double-space position at Fig'. 6. Thus the single spring 29 serves both-for turning the line-space lever and holding the line-space regulator in either position in which it set. The toe 32 is bent outwardly, as indicated at 40, (Fig. 2), to en able it to'project into the notch in the plate 3.

When it is desired to cast oif the detent 11, linger-piece l1 formed upon a lever 42 pivoted at 13 on the-lower rear portion of the plate 3,ihaving a cam the projecting end 45 of the stud or arbor 15 roll 11. is mounted. By lifting this fingerpiece 4,1, the stud 45 is cainmed rearwardly, and they roll 11 swung out of engagement upon which the detent with the line-space wheel, so'that the platen may be turned freely to any desired position. It will be seen that the lever 42 is folded at sound has an arm +t7 parallel with 4-2 at Fig. 5, and having the .cam slot 4A as well as the pivot screw It will be observed that all'of the parts are designed for lightness and compactness well as economy, these three features being of-importance in portable typowriting machines, for wlmich this invention is designed. Variations may be resorted to within the and portions of the improvements may be used without others. Having thus described my invention, I claim:

1. The combination with a platen, a platen frame, and a line-space wheel, of a lever pivoted upon the platen frame and comprising an arm which extends upwardly and carries a finger-piece at its upper end, said lever also having a rearwardly-extending arm, an up-and-down moving link extendingupwardly from said rearwardly extending: arni, a bell-crank mounted on the platen frame-and com 'risin an u and-down movh said bell-crank.

2. The combination with a platen, a platen frame,'and a line-space wheel, of a lever platen frame and extend ing upwardly and carrying a finger-piece at-its upper end, said lever having a rearwardly-extendin'g' arm, a linh extending upwardly from said arm, a bell-crank mounted concentrically with the platen and comprising anarm attached to said link. and a linespacing pawl pivoted on the other arm of said bcll-cranlgsaid platen-frame comprisinq a plate upon the outer side of which said lever is pivoted, and said bellcrank arranged on the inner side of said plate and having a wrist extending through said plate to be engaged by said link.

3. The combination with a platen, a platen frame, and a line-space wheel, of a pivoted arm, a pawl upon said arm, a toe projecting from said pawl, a spring for returning said arm, said arm holding said toe against a fixture, to hold the pawl clear of the linespace wheel, and a stop in the path of said toe to be engaged thereby at the conclusion of the driving of the platen, to lock the pawl into the line-space wheel.

4. The combination with a platen, a platen frame, and a line-space wheel, of an arm pivoted to swing around the platen axis, a lever for driving said arm, a pawl upon said arm, a toe upon said pawl, a spring for returning said arm, said arm holding said toe against a fixture, to hold the pawl clear of the line-space wheel, and a stop engageable by said toe at the conclusion of the driving of the platen, to lock the pawl into the line-space wheel, said stopbeing adjustable out of the path of said toe, and a second stop being. provided in the path of said toe to arrest the platen at the conclu-' sion of a longer stroke thereof, and also to lock the pawl in engagement with the linespace wheel.

5 The combination with a platen, a platen frame, and a line-space wheel, of an arm pivoted to. swing around the platen axis, a lever for driving said arm, a pawl upon said arm, a toe upon said pawl, a spring for returning said arm, said arm holding said toeagainst a fixture, to hold the pawl clear of the line-space wheel, a stop engageable by said toe at the conclusion ofthe driving of the platen, to lock the pawl into the line- 'space wheel, said stop being adjustable out of the path of said toe, a second stop being provided in the path of said toe to arrest the platen at the conclusion of a longer stroke thereof, and also to lock the pawl in engagement with the line-space wheel, said 'mo'vable stop being pivoted upon the platen frame,'and a draw spring to hold said movable stop in either of its positions, said platen-driving "lever being mounted upon the platen frame, and said draw spring besame.

frame, and a line'space wheel, of an arm 7 mg connected to said lever to return they pivoted to' swing around the platen axis, a lever for driving said arm, a pawl upon said arm, a toe upon said pawl, a s ring for returning said arm, said arm hol in said toe against a fixture, to holdthe paw clear of the line-space wheel, a stop engageable by said toe at the conclusion of the driving of the platen, to lock the pawl into the linespace wheel, said stop being adjustable out of the path of said toe, a second stop being provided in the path of said too to arrest the platen at the conclusion of a longer stroke thereof, and also to lock the,pawl in engagement with the line-space wheel, said movable stop being pivoted upon the platen frame, and a draw spring to' hold said movable stop in either of its positions, said platen-driving lever being mounted upon the platen frame, and said draw spring being connected to said lever to return the same; a spring being provided for engaging sl'aid pawl with the line-space ratchet whee 7. The combination of a platen, a linespace wheel, mechanism for driving the linespace wheel, a returning spring for said driving mechanism, and a line-space regulator settable to different positions, said re: turning spring connected to said regulator to hold it in either position.

8. The combination with a platen, a platen frame, and a line-space wheel, of a lever pivoted upon the platen frame and'extending upwardly and carrying a finger-pieceat its upper end, said lever having a rearwardly-extending arm, a link extending 1ipside of said plate, and having a stud projeeting through said plate to be cammed by said cam lever.

FRANCIS o. BURRIDGE;

'Emecutor of. tiwlast will and testamnt'of Lee S. Bur-ridge, deceased.- Witnesses: v

G. W. HOWELL, J r., Enrrn D. PENROSE. 

